org.openimaj.ml.annotation.utils

Class LiblinearHelper

java.lang.Object

org.openimaj.ml.annotation.utils.LiblinearHelper

public class LiblinearHelper
extends Object

Helper methods for interoperability of OpenIMAJ types with Liblinear.

Author:

Jonathon Hare (jsh2@ecs.soton.ac.uk)

Constructor Summary

Constructors

Constructor and Description
LiblinearHelper()

Method Summary

Modifier and Type	Method and Description
static de.bwaldvogel.liblinear.Feature[]	convert(FeatureVector feature, double bias) Convert a FeatureVector to an array of Features.
static double[]	convertDense(FeatureVector feature, double bias) Convert a FeatureVector to an array of doubles using FeatureVector.asDoubleVector().

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LiblinearHelper

public LiblinearHelper()

Method Detail

convert

public static de.bwaldvogel.liblinear.Feature[] convert(FeatureVector feature,
                                                        double bias)

Convert a FeatureVector to an array of Features.

Parameters:

feature - input FeatureVector

bias - any bias term to add. if <=0 then no term is added; otherwise an extra element will be added to the end of the vector set to this value.

Returns:

output Feature array

convertDense

public static double[] convertDense(FeatureVector feature,
                                    double bias)

Convert a FeatureVector to an array of doubles using FeatureVector.asDoubleVector().

Parameters:

feature - the feature

bias - any bias term to add. if <=0 then no term is added; otherwise an extra element will be added to the end of the vector set to this value.

Returns:

the double[] version of the feature